how long are you keep on leaving it until 1-2% because i have been doing this for about 1 month

You shouldn't do that regularly..that will kill a battery quicker than anything you can do. You should run it dead about once a month to every six weeks. Generally try to keep your battery above 20% or so...that will help keep it fresh for as long as possible.

Idk if this is obvious or not, but I'm pretty sure the heat of the phone throughout the day is an evident factor of the phone working too hard, thus draining battery unexpectedly. Therefore, restart you phone if it ever gets too hot, and battery life should improve.

This would be 2 duds in a row :/
Sent from my Windows Phone 8X by HTC using Board Express

This information comes from HTC Europe and was posted on pocketpc.ch

- You should, once in a while switch off your phone while still connected to the charger when it has completed its charge cycle. It will restart and charge some more. This is due to battery meters that are not properly adjusted. You should repeat this procedure at least 3-4 times or until the charge light goes to green quickly after the restart. (I tried this on my two 8X, adds like 35min of charging it seems. Battery seems to be better afterwards.)

- You should, once in a while switch off your phone while still connected to the charger when it has completed its charge cycle. It will restart and charge some more. This is due to battery meters that are not properly adjusted. You should repeat this procedure at least 3-4 times or until the charge light goes to green quickly after the restart. (I tried this on my two 8X, adds like 35min of charging it seems. Battery seems to be better afterwards.)

Give it a try!

What is "quickly"? I couldn't seem to get this to work. Check your battery tips thread.

If apps are running in the background, it will drain your battery. With my HTC 8X, while it's only two days old, I let the battery drop to 1-2% and recharged it fully overnight to "calibrate" the phone so it knows the battery's true capacity. I'm doing this for the next couple days. Out of the box, I also enabled power saving for when the battery gets low, disabled most live tiles that I don't need, etc..

I've been going 12 hours with moderate use such as texting, facebook, internet, music, and the odd short phone call, and I'm at 49%. I consider that very reasonable. Although lots of cases are different, but you have to give it time and use to improve. I also don't live in the best service area, I keep Wifi on all the time, auto brightness for screen, Bluetooth and NFC are off.

Background apps do not drain battery. They update their tiles once every thirty minutes, which is a very miniscule amount of time, so not much processing power is needed for them.

Also, when you say you keep Wi-Fi on, do you mean only when there isn't good data connection or at all times even when not connected to wireless internet?

My 8X drains zero when off. For a night, if I store it a week, it will lose battery. Like down to 80% after two weeks. This is supposed to be normal for Li batteries which tend to go to 70-80% during storage.

This morning, I pulled the phone off the charger and after 3 hours I'm down to 80%. Usually, at this point in the day, I'm at 90-95%. If anything, I've used it less today than normal. The only app that's been updated in the past week is ProShot and that was yesterday. Coincidence? I've restarted the phone twice today and it's still burning hard and fast. Thoughts?

Have you been traveling? A lot of times if the phone is always searching for a solid data connection, the battery will drain quickly. When traveling while in a car, train, what have you, try to keep mobile data off.

I honestly found that my 620 also has inconsistent battery life. At times, it will reach 90% in an hour and at times, 70% in an hour (It happens only occasionally). More like a software issue to me but it does not bothering me too much.

This morning, I pulled the phone off the charger and after 3 hours I'm down to 80%. Usually, at this point in the day, I'm at 90-95%. If anything, I've used it less today than normal. The only app that's been updated in the past week is ProShot and that was yesterday. Coincidence? I've restarted the phone twice today and it's still burning hard and fast. Thoughts?

I usually average about 2-3% discharge per hour but today for some reason, it's going out at 8-9%/hr. The only thing that has changed on the phone is a ProShot update yesterday. I've restarted multiple times today to no avail. Anybody else got any ideas? It's really starting to frustrate me.

Are you just restarting or doing a soft reset? If you haven't tried a soft reset that almost always fixes my issues with high battery drain. You can do a soft reset by holding the volume down and power keys simultaneously for 10 seconds or so.

I do admit that I had few calls but I used the wifi a lot(no 3G cause I'm roaming), news, fb, downloading game from store and playing it, messaging. I listen to music (downloading from subscription cause it has better quality but before I download I listen the song on streaming)
I have Skype on, WhatsApp, LinkedIn, Facebook, Twitter, Metrotube, Vimeo, 4 e-mail accounts.
I also disabled the auto upload of Skydrive.
And I don't use stop music app.